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[Sayantan Das <1327598@xxxxxxxxxxxxxxxxxx>]

Hi Christopher,

Tested with  3.15.0-031500-generic #201406081435. I get the same error.
Attached is the dmesg


** Attachment added: "-----------------------------1224143649"
   https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1327598/+attachment/4129178/+files/dmesg.txt

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https://bugs.launchpad.net/bugs/1327598

Title:
  running bumblebee in Ubuntu 14.04 results in call trace in logs

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I tried installing bumblebee with nvidia-337 graphics  driver.
  Bumblebee does not work.

  WORKAROUND: Don't install bumblebee.

  # Configuration file for Bumblebee. Values should **not** be put
  between quotes

  ## Server options. Any change made in this section will need a server restart
  # to take effect.
  [bumblebeed]
  # The secondary Xorg server DISPLAY number
  VirtualDisplay=:8
  # Should the unused Xorg server be kept running? Set this to true if waiting
  # for X to be ready is too long and don't need power management at all.
  KeepUnusedXServer=false
  # The name of the Bumbleblee server group name (GID name)
  ServerGroup=bumblebee
  # Card power state at exit. Set to false if the card shoud be ON when Bumblebee
  # server exits.
  TurnCardOffAtExit=false
  # The default behavior of '-f' option on optirun. If set to "true", '-f' will
  # be ignored.
  NoEcoModeOverride=false
  # The Driver used by Bumblebee server. If this value is not set (or empty),
  # auto-detection is performed. The available drivers are nvidia and nouveau
  # (See also the driver-specific sections below)
  Driver=nvidia-337
  # Directory with a dummy config file to pass as a -configdir to secondary X
  XorgConfDir=/etc/bumblebee/xorg.conf.d

  ## Client options. Will take effect on the next optirun executed.
  [optirun]
  # Acceleration/ rendering bridge, possible values are auto, virtualgl and
  # primus.
  Bridge=auto
  # The method used for VirtualGL to transport frames between X servers.
  # Possible values are proxy, jpeg, rgb, xv and yuv.
  VGLTransport=proxy
  # List of paths which are searched for the primus libGL.so.1 when using
  # the primus bridge
  PrimusLibraryPath=/usr/lib/x86_64-linux-gnu/primus:/usr/lib/i386-linux-gnu/primus
  # Should the program run under optirun even if Bumblebee server or nvidia card
  # is not available?
  AllowFallbackToIGC=false

  # Driver-specific settings are grouped under [driver-NAME]. The sections are
  # parsed if the Driver setting in [bumblebeed] is set to NAME (or if auto-
  # detection resolves to NAME).
  # PMMethod: method to use for saving power by disabling the nvidia card, valid
  # values are: auto - automatically detect which PM method to use
  #         bbswitch - new in BB 3, recommended if available
  #       switcheroo - vga_switcheroo method, use at your own risk
  #             none - disable PM completely
  # https://github.com/Bumblebee-Project/Bumblebee/wiki/Comparison-of-PM-methods

  ## Section with nvidia driver specific options, only parsed if Driver=nvidia
  [driver-nvidia]
  # Module name to load, defaults to Driver if empty or unset
  KernelDriver=nvidia-337
  PMMethod=auto
  # colon-separated path to the nvidia libraries
  LibraryPath=/usr/lib/nvidia-337:/usr/lib32/nvidia-337
  # comma-separated path of the directory containing nvidia_drv.so and the
  # default Xorg modules path
  XorgModulePath=/usr/lib/nvidia-337/xorg,/usr/lib/xorg/modules
  XorgConfFile=/etc/bumblebee/xorg.conf.nvidia

  ## Section with nouveau driver specific options, only parsed if Driver=nouveau
  [driver-nouveau]
  KernelDriver=nouveau
  PMMethod=auto
  XorgConfFile=/etc/bumblebee/xorg.conf.nouveau

  attached is the dmesg log
  ---
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  sayantan   2374 F.... pulseaudio
   /dev/snd/controlC0:  sayantan   2374 F.... pulseaudio
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=bf97d424-fc0a-40d8-a799-ee28fc70d432
  InstallationDate: Installed on 2014-06-01 (6 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  MachineType: Dell Inc. Vostro 3300
  Package: linux (not installed)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic root=UUID=0cdd0302-af0e-41f3-9d3c-5992d54b61c8 ro persistent quiet splash
  ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-27-generic N/A
   linux-backports-modules-3.13.0-27-generic  N/A
   linux-firmware                             1.127.2
  Tags:  trusty
  Uname: Linux 3.13.0-27-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm bumblebee cdrom dip lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 10/25/2010
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A10
  dmi.board.name: 07JC8T
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A10
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A10
  dmi.modalias: dmi:bvnDellInc.:bvrA10:bd10/25/2010:svnDellInc.:pnVostro3300:pvrA10:rvnDellInc.:rn07JC8T:rvrA10:cvnDellInc.:ct8:cvrA10:
  dmi.product.name: Vostro 3300
  dmi.product.version: A10
  dmi.sys.vendor: Dell Inc.

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